Pulverizer.



Patented Oct. 3, I899. B. YATES.

PULVERIZER.

(Application filed Aug 22, 1898.)

('N0' Model.)

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FFIQE.

PATENT ROBERT YATES, OF ST. LOUIS, MISSOURI.

PU LVER-IZER.

SPECIFICATION forming part of Letters Patent No. 634,254, dated. October 3, 1899.

Application filed A st 22, 1898. Serial No. 689,232. (No model.)

To all whom it may concern:

Beit known that I, ROBERT YATES, a citizen of the United States, residing at the city of of St. Louis, Stateof Missouri, have invented a certain new and usefulImprovementinPulverizers, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which. it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a longitudinal sectional view of my improved pulverizer. Fig. 2 is a front end elevationalview. Fig. 3 is a cross-sectional view on line 3 3, Fig. 1. Fig. at is a sectional view on line a4, Fig. 1. Fig. 5 is a side View of the ring carrying the bucket-partitions. Fig. 6 is a rear face view of said ring; and Fig. 7 is an enlarged sectional view through the cylinder, showing the manner of securing.

the steel lining in position. v

Heretofore in the use of pulverizers of this class where a constant feed is employed the material to be pulverized is conveyed directly into the body of the cylinder onto the balls or loose rock forming the grinding medium. In some of these machines the material is fed through a hollow axle into the cylinder. In other machines a worm is introduced into the hollow axle or shaft to convey the material into the cylinder. Other machines again have no aXle,the material being introduced through a central opening in the end of the cylinder, in which case the cylinder revolves on deadrollers.

This invention relates to a new and useful improvement in pulverizers of the dead-roller class.

The objects of my present invention are to simplify the construction of the feed in continuous pulverizers, increase the capacity and,

buckets revolve with thecylinderand receive the material to be ground from the antechamber and, acting as elevators, carry it around to the top of the cylinder and dis charge it on top of the balls in the body ofthe machine. By this construction'I am enabled to employ a larger quantity of grinding medium Within the cylinder, and thereby increase the capacity of the machine, and I am also enabled to drive the machine with less power than would be required were the cylinder but half-full of balls and the weight of the same all on one side of the axis.

Another feature of my invention resides in the construction and arrangement of the parts to form the buckets, in which the inlet-openings connect with an antechamber in which the material to be ground is received, said buckets having their outlet openings or mouths connecting with the interior of the cylinder.

Other features reside in the novel construction, arrangement, and combination of the several parts, all as will hereinafter be described and afterward pointed out in the claims. y

In the drawings, A indicates the head of the machine, which is supported by rollers b I), mounted in suitable bearings in a block 0. Head A has secured or formed thereon teeth a, which mesh with a pinion d, mount-- ed in blockc. Pinion d is driven by a suitable belt running over a pulley c, and rotation is thus imparted to the cylinder. The cylinder maybe rotated in either direction, as desired, and other gearing than that shown may be employed to drive the same. Head A is practically bell-shaped in cross-section that is, it is made flaring at its rear, so as to form a continuous pocket at its bottom, into which pocket the material is fed through a spout B. The front end of this head A is preferably closed by a plate 00, which is formed with a central aperture, through which the supply-spout is introduced.

0 indicates a ring formed with plates constituting partition-walls c, which-project radially therefrom, there being any desired number of these partitionwalls, depending fall through said space into pockets at the bottom of the head, as shown in Fig. l. I preferably converge the walls of ring C toward the rear, so that when the material carried up by the partition-wall 0 reaches the top of the machine all of it will be conducted to the interior of the cylinder. A plate y closes the reduced opening at the rear of ring (J.

Forsecuring thehead A to the cylinder and holding the ring 0 in place the cylinder-cas ing is provided or formed with a securingflange or ring 1), between which and the rear portion of the head A the partitions c in the ring 0 lie. Bolts passing through the head and securingdiange D secure the head to the cylinder and clamp therebetween the partitions 0', thus firmly uniting the head and cylinder and securing the ring. A space is left between the inner flanged on the cylinder and the ring C, through which the material enters the cylinder.

E indicates the outer casing or shell of the cylinder,whichispreferablycastintegral with the ring D, said shell having a removable portion (2, by which access canbe gained to the interior of the cylinder. I prefer to form or provide the cylinder with a sheet-metal lining instead of a stone lining, as has heretofore been used, and in order that the sound of the falling balls may be deadened I pack the space between the inner shell and the outer casing.

F indicates the inner shell, which, as shown in Fig. 7, is preferably rolled or bent into the desired form and diameter, which shell is first looselyintroduced into the casing E, after which suitable strips G are placed in position so as to properly space said inner shell from its outer casing. These strips may be introduced close together throughout this space. or,.as shown in Fig. 7, fibrous packing g may be employed between these strips. 4

H indicates the balls, which are preferably made of iron or steel and which may be introduced into the cylinder through the opening closed by the door e. The cylinder may be divided into compartments in which different-sized balls may be used, as shown in the drawings. In compartment a, being the first compartment in which material is acted upon, I prefer to use large heavy balls to primarily reduce the material, after which the material passes through the openings or perforations in the partition P in the cylinder and into compartment 66', in which the balls are smaller in diameter and reduce the ma terial to a finer mesh. The small balls lying close together or forming a more compact mass have a greater reducing action on the material than the largerballs, and these small balls reduce the material to a degree of fineforated partition P, through which the material finally escapes into a chamber in tailcasting'l. TaitcastingTis preferablyformed with flaring inner walls, which are bolted or otherwise secured to the rear end of the cylinder, and in the increased diameter of this casting are arranged a series of partitions l, which not only act as braces for the partitionwall P, but also assist in agitating the material and elevating it so that it will easily run out into the discharge-spout U, which spout preferably has a head U, embracing the discharge end of the machine.

Idle-rollers a, mounted in block /',support the rear end of the machine.

The operation of the machine is as follows: The material to be pulverized is introduced into the antechamber in head A through the spout I a continuous feed being preferable. The cylinder is rotated at; such speed that the balls in the several compartments will be carried around,as shown in Fig. 3,and upon reaching the top will drop, thus producinga shower of balls on the material to be acted upon, whose impacting blows soon reduce said material into an impalpable powder. As the material reaches the antechamber it falls through the space between the head A and ring 0 into the buckets formed by the partitions 0, whence it is carried up by the rotation of the cylinder to the top thereof, when it is discharged through the space between ring 0 and flange D into the interior of the cylinder or the first compartment, which, as before stated ,preferably contains balls of comparatively large diameter, whose function is to primarily reduce the material to a fine state. As the material is being constantly fed on top of the balls it gradually works to the rear until it passes through the perforations of partition P into the second compartment, where it is acted upon by balls of smaller diameter, which tend to reduce the material to a still finer grade. From the second cornpartment the material passes through the perforations of partition P into another com partment, if such be added to the length of the machine, or, as shown in the drawings, into the tail-casting, whence it is conducted off by the discharge-spout.

It will be understood that as many compartments and as many different sizes of balls may be employed to act upon the material as desired.

\Vhile I have shown and described balls as being the grinding medium to reduce the material and have described a steel lining to cooperate with these balls, it is obvious that a stone lining can be used with rocks as the reduein g material.

I am aware that minor changes in the construction, arrangement, and combination of the several parts of my machine can be made and substituted for those herein shown and described without in the least departing from the nature and principle of my invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. The combination of a cylinder-casing provided at or near one end with a securing flange or portion, a hollow head formed with flaring walls, an oppositely-flaring ring located. in said head and provided with radial plates extending beyond its external periphery and between said head and securingfiange, means for securing said head to said flange and clamping said partitions therebetween to form partitions and to hold the ring in position, and external means for rotatively supporting said head, substantially as described.

2. The combination with a cylinder provided at one end with a sec'uringflange, of a hollow head A, a flaring ring 0 arranged in said head and having plates 0 projecting beyond the same and between said head and securing-flange, a plate for closing the inner end of said ring, means for securing said head to said securing-flange and clamping said plates therebetween to form partitions and to hold the ring 0 in position, and means ro tating said head ,and cylinder, substantially. as described.

3. The combination with a cylinder provided at one'end with a securing-flange, of a hollow head A having a bearing portion by ROBERT YATES.

\Vitnesses:

F. R. CORNWALL, WM. H. Scorn 

